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https://curiosidadesnainternet.com/2019/07/22/apple-lanca-ios-12-4-e-watchos-5-3-para-corrigir-bug-do-walkie-talkie-tecnoblog-curiosidades/
Apple lança iOS 12.4 e watchOS 5.3 para corrigir bug do Walkie Talkie — Tecnoblog | CURIOSIDADES